Time to make Lokarr swollow his words. I've long wanted a bad ass Vitality/Chaos build that also abuses Doom Bolt and, after lots of testing, i've arrived to what is to me personally the easiest Crucible Gadiator build I have played. For a caster it has incredible resillience, able to stand in the middle of Elite mobs/Nemeses wreaking havoc with powerful procs and skills and tearing heroes in half with 2x Doom Bolt thanks to Time Dilation.

Video - Wave 140-150 Crucible of the Dead, arguably the hardest map for a caster but no problems here. Finished with horrendous lag as usual but that's good news for you because it means you can perform better than me:https://www.youtube.com/watch?v=ioxe-8H1nwQ

Some of the worst mutators to have in crucibe vs maiden, she sneaks a bursty crit in but that is all. And btw Flame Torrent was only lvl 12 in this video and Time Dilation lvl 9. It will be even better for you then

Fights are very relaxed, just spam your spells. I deliberately face tank large mobs because the build can (within reason) and to maximize the added damage from flame torrent. Same can be done with Nemeses.

Although there is no Sharz+Sentinel at 149, the fights are just as relaxed, just go in and out. Let Sharz cast is stun+fire cleave then go at him. Kill the little guys first: Alkamos because >>he can freeze you<<, this is the only danger

Pic without crucible bonuses. DA is in a good place, OA is just fine with crucible bonuses. Getting good DA and OA is the only challenge with this build since we olny have Blood of dreeg.Build grim calc without +skills & devotions:https://grimcalc.com/build/1009-q2HSA5With +skills:http://grimcalc.com/build/1009-tE0Xi1
Notice I have dropped Manticore in Favor of Solemn watcher. Best decision imo. Manticore may give you higher numbers when it procs but survivability will be less reliable, you are already doing very good damage. Will leave in grim calc too along with the new tool for displaying gear and devotions which you can see lower in the Gear section.

Gameplay & Devotion Binding:Curse of Frailty - Wendigo's MarkDevouring Swarm - Eldritch FireSigil of Consumption - Flame TorrentSolael's Flame (from Symbol of Solael) - Hungering Void - You can put it on Chaos Strike too but I find this one better if you are forced to Kite. You will have maximized damage always while on the moveDoom Bolt - Time Dilation

Using this very helpful tool for the first time. If for whatever reason there will be requests for the usual list of gear i'll do it. Note that there is one stat point because i haven't yet done Hidden Path on Normal/Veteran

Some notes for Vanilla:
You can use Devil's Cage Hauberk instead of Chestguard of Justice. Elemental resists can be compensated with augments since Aether and Chaos are generously overcapped. Also for anyone playing only Vanilla NON HC you can sneak in Manticore instead of Watcher for more damage. Watcher is there to give well rounded defense in crucible where we are already doing a lot of damage.

Chest components. Hollowed ground is strictly for vanilla to meet the outstanding rigors of DA requirements there. Shield builds can get away with just over 2200 DA. I felt this build needed more. feel free to use Chains of Oleron for more OA (very useful) and % total damage or Kilrian's Shattered soul
Some detailed insights:The resilience of the build comes from having very strong life stealing spells and procs (except for Wendigo's Mark they don't do a whole lot of damage but combined, they add up nicely):

I'm Really hoping the expansion will show Doom Bolt more love. Maybe some set or gear that give it modifiers. It would be cool to have a build even more centered around this skill, much like Shadow Strike builds.